At one time, there was CompuServe, America-on-Line, GENIE and MCImail and I had an address on all of them. Thankfully, Bryant Gumbel, Katie Couric and Elizabeth Vargas were there to explain it all to America. Katie gets major points for predicting the internet would be big some day. And yes, Bryant you can write to it, but you might not like the answers you get.
Bryant & Katie explain the internet in 1994.